org.eclipse.scada.da.ui.widgets.realtime.RemoveAction.java Source code

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Here is the source code for org.eclipse.scada.da.ui.widgets.realtime.RemoveAction.java

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/*******************************************************************************
 * Copyright (c) 2010, 2011 TH4 SYSTEMS GmbH and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     TH4 SYSTEMS GmbH - initial API and implementation
 *******************************************************************************/
package org.eclipse.scada.da.ui.widgets.realtime;

import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.ui.IEditorActionDelegate;
import org.eclipse.ui.IEditorPart;

public class RemoveAction extends Action implements ISelectionChangedListener, IEditorActionDelegate {
    private RealtimeListAdapter view = null;

    private Collection<ListEntry> entries;

    public RemoveAction(final RealtimeListAdapter view) {
        super(Messages.RemoveAction_Name,
                ImageDescriptor.createFromFile(RemoveAction.class, "icons/delete_obj.gif"));

        this.view = view;
    }

    @Override
    public void run() {
        if (this.entries == null || this.view == null) {
            return;
        }
        this.view.remove(this.entries);
    }

    @Override
    public void selectionChanged(final SelectionChangedEvent event) {
        setSelection(event.getSelection());
    }

    @Override
    public void setActiveEditor(final IAction action, final IEditorPart targetEditor) {
        if (targetEditor instanceof RealtimeListAdapter) {
            this.view = (RealtimeListAdapter) targetEditor;
        }
    }

    @Override
    public void run(final IAction action) {
        run();
    }

    @Override
    public void selectionChanged(final IAction action, final ISelection selection) {
        setSelection(selection);
    }

    private void setSelection(final ISelection selection) {
        this.entries = new LinkedList<ListEntry>();

        if (selection instanceof IStructuredSelection) {
            final Iterator<?> i = ((IStructuredSelection) selection).iterator();
            while (i.hasNext()) {
                final Object o = i.next();
                if (o instanceof ListEntry) {
                    this.entries.add((ListEntry) o);
                }
            }
        }
    }
}